📚 Master JavaScript Closures

JavaScript closures are a powerful feature that allows functions to remember values from their parent scope, even after the parent function has completed. They are created when a function is defined inside another function, and the inner function has access to the outer function's variables and parameters. Closures are often used in event handlers, callbacks, and for creating private variables in JavaScript classes.

To create a closure in JavaScript, you define a function inside another function and return the inner function as a value. This creates a reference to the outer function's variables and parameters, allowing the inner function to access and modify them. It's important to note that each time the outer function is called, a new closure is created with its own set of variables.